Amicus
I don't dispute your opinion for one second about the thermodynamic issues with composite structures, what I do dispute is your opinion on the viability of repair of the structure.
The industry is metalcentric and up untill very recently most people tryed to impose a metal style repair on a composite structure, this was usually expensive, disruptive to the shape of the structure and added weight to the structure, in short just about all the things you do not want in an aircraft repair.
Things have moved on, composite repair is now better understood and even Boeing one of the worst practitioners of composite repairs have moved on considerably. I don't agree with your bleak outlook on the Ethiopean aircraft and think that a repair can be made on an economic basis and not just to save face at Boeing......... Just as long as it is left to those who understand composite repair techniques and the metalcentrics are kept away from the aircraft.